Machine-gun.



MACHINE GUN. APPLICATION FILED EEB.25, 1914.

Patented Jan. '5, 1915.

4 SHEETS-SHEET 1.

lwm'of A. A. K. HBINEMANN.

MACHINE GUN.

.APPLICATION FILED FEB. 25, 1914.

.1,123,53@ Patented Jan. 5, l1915.-

121 4 SHEETS-SHEET 2.

A Wzesses.- fr l @W @63mm Mpx" A. A. K.' HBINEMANN.

r MACHINE GUN. 'APjeLmATloN PLLD rm. 25', 1914.

Patented aan. 5, 1915.

yjAlzsao.'

AAA. M

A. A. K. HEINBMANN.

MACHINE GUN. A-PPLIOATION FILED IEB.25,1914.

1,123,530, Patented Jan. 5,1915.

is iran sas anni Enron.

AUGUST ALBERT KAEL HErNEMANN, or BERLIN, GERMANY, Assrenon To DEUTSCHE' f .WAEEEN- UND MUNITIONSFABRIKEN, F BERLIN, GERMANY.

MACHINE-GUN.

Speccation of Letters Patent.

,'ratentedaan. e, i915.

Original application led August 7, 1913, Serial No. 783,479. Divided and this application led February 25, 1914. Serial No. 820,807.

To all whom t may concern Be it known that I, AUGUST ALBERT KARL 1^ HEmEMANN, a citizen of the German Em- Improvements in Machine-Guns, of which the following is a specification. l

ments in machine guns and refers more particularly to an improved cartridge 'feeding' mechanism of theclass in which the beltslide which after each firing feeds the cartridge belt stepwise through the transverse opening of the cartridge feeding casing, receives its transverse to and fro movements in the cartridge feeding casing by the movements of the sliding barrel.

The object of my invention is to provide means whereby the length of the stroke of the belt-slide is terminated and made indey pendent of the varying length of the recoil of the barrel, so that the feeding stroke o f ing length or not. And with this end in view my invention consists in certain novel features of construction 'and combinations-l of parts which allow of a certain idle motion in the train ofthe connecting means between the belt-slide and the sliding barrel, so that when the belt-slide has completed its outward stroke necessary for seizing a new cartridge, the influence of the still further recoiling 'barrel upon the beltslide ceases, and the latter remains stationary in `its outer position, until the barrel has completed its recoil and has traveled of its subsequent forward movement a length corresponding tothe idle motion of the connecti ing means. At .this time the forward tsliding barrel begins to act upon the belt-slide -in the opposite direction and effects the inward stroke of belt-slide. 1

In order that my inventionmay be more fully understood I shall now proceed to describe the same by way of example in detail and for that purpose shall refer to the ac companying sheets of drawings in which Figure l is a side elevation of the rear part and Fig. 2 a longitudinal section of the front part of ahand machine gun provided with Va'cartridge feeding mechanism constrmtedin accordance with and embodying -through it.

my invention, in this Fig. 2 the lock is inthe closed position and 'the tiring pin uncooked;

is taken on the line I-II of FiO. 8; Fig. 6 is The present invention relates to improvea part of the gun disclosing the belt locking device; and Fig. 9 is a detailed top plan view of the two belt-levers. l

Similar letters and figures rof reference refer to similar parts throughout the several views.

The cartridge feeding mechanism arranged in front of the lock a (Fig. 2) above in the direction of the .arrow shown in.-

Figs. 4 7. The left-hand portion of the aperture is only so `large that the belt emptied of cartridges can conveniently. pass The belt-slide or p1` 1sher 9 is located inthe casing 3 above the said transverse aperture and is shifted when the barrel slides. For this 'purpose a vertical crankshaft 11 f Figs. 4J() is mounted in the cas- 'ing 3, and a pin 101 of its lower crank-arm 10 engages in a slide 102 displaceable in the transverse recess 51 of the barrel, while a pin 121 of its upper crank-arm 12 engages in an angular slot or groove 91, 92 in the belt-slide 9. The part 91 of the slot which effects the displacement of the belt-slide, is

l parallel to the axis of the barrel, While the non-effective part 92 of the said slot runs in 121. This'slide 94 is provided at its rightand end with a spring-iiilienced feederleverlB.

After tiring a shot the lock aand the bar- T915 slide at {irst backward together, wherethe sliding barrel 5 and at the rear end of parallel to the circle described bythe crank ment of the belt-slide 9 ceases.

\ while the lock which in the meantime has separated from the barrel 5, slides farther backward and withdraws the preceding cartridge p1 out of the cartridge-feeder and the belt 4 in known manner. While the lever 13 slides over the cartridge p2 the lat-v ter bears against the lugs 141, 151 of bell' crank belt-levers 14 and 15, (Figs. 5 and 8), which lugs preventthe cartridge p2 and the belt 4 from yielding to the right. The said levers 14 and 15 are pivoted on a screw-pin 16 fastened in the right-hand side wall c1" of the receiver C (Figs. 2 and 8).

At the termination of the outward motion' of the belt-slide 9 the recoil of the barrel 5 should also terminate.' At the length of the recoil of the barrel is not always the same but varies in some limits, so it may happen that the recoiling barrel acts too long upon the belt crank device 10, 11, 12, whereby the belt-slide 9 will be pushed outward too great a distance, so that its lever 13 may perhaps engage the second subsequent cartridge p1 (Fig. 5). To prevent such occurrence which would bring the whole gun out of function, and to obtain in all events a certain predetermined length-of outward movement of the belt-slide in spite of the varying length of the recoil of the barrel the effective slot 91 in the belt-slide 9 is provided with a non-efl`ective partf92 insuch a manner that 'during the last part of the rearward rota-v tion of the crank 10, 11,-12, and consequently also during the first part of its forward rotation, this crank leaves the belt-slide uninlluenced, so that when the latter has reached its required extreme outer position, the barrel can slide back still farther without acting on the belt-slide, (Fig. 7).

If the barrel is pushed forward by closing I the lock the crank 10, 11, 12, will be rotated in forward direction but it does not act upon the belt-slide as long as the crank pin 121 f is moving in the part 92 of the slot, but when the crank pin 121 enters into the effective part 91 of the slot the vforward rotation of the crank device will cause the inward movement of the belt-slide. During this inward movement the feed-lever 13 drives the seized y cartridge p2 and the cartridge-belt with it and brings the cartridge into the cartridge bed 2 of the casing 3 in which the cartridge l5* p1 was previously located; The part of the belt emptied of cartridges slides a corresponding distance through the outlet c* (Fig. 5) in the left-hand side wall cs of the receiver C. s

If it is desired to withdraw the cartrid'gef belt to the right, it is only necessary to press together the lower arms of the belt-levers 14 and 15 against the action of a spring 17.

,The upper ends or lugs 141, 151 of these levers are thereby rocked downward and the lugs thus removed out of the path of the cartridges, so that the belt can be unimpededly withdrawn toward the right. The lugs 141, 151 are beveled on their outer sides, so that the cartridges when pushed forward that is to say inward by the feed-lever 13 can readily slide over them.

Subject-matters of invention disclosed herein, but not claimed form the subject-l matters of my prior application Ser. No.y 783,471, filed August 7th 1913 and of two other contemporary divisional applications Serial'Nos. 820,805 and 820,806 both filed February 25, 1914.

1. In a machine gun, the combination of a sliding barrel, a stationary feeding casing, a cartridge belt transversely movable through said casing, a belt-slide adapted to be moved transversely in said casing to intermittently feed said cartridge belt, a device connected with said barrel and actuated thereby and means for connecting said slide with said device whereby the recoil of the gun is immediately transmitted to said slide and whereby the latter remains at rest during the finish of the said recoil and during the beginning of the forward movement of the barrel. y

2. In a machine gun, the combination of a sliding barrel, a stationary feeding casing, acartiidge belt transversely movable through said casing, a belt-slide adapted to be moved transversely in said casing to intermittently feed said cartridge belt,'said belt-slide bei-ng provided with a guide-slot having an eHective portion, and a non-effective portion. a crank-shaft liournaled in said4 feeding casing, an arm carriedby said shaft and connected with said sliding barrel, a

. second arm carried by said shaft and movable in the effective portion of said slot iinmediately at the beginning of the recoil of the barrel to actuate said belt-slide and in the non-effective part of said slot4 during the finish of said recoil whereby said slide remains at rest during said finish of said recoil and a yielding cartridge feed-lever ,attached to the belt-slide.

3. In a machine gun, the combination of a slidingbarrel having a transverse groove, a stationary feeding casing, a slide mounted in said transverse groove, a crank-shaft,

journaled in said casing, an arm carried by said crank shaft and connected with said slide, a belt-slide movable in said casing and orovided with a guide-slot having an effective portion extending parallel with the axis "i the barrel and with a non-eective portion extending in a direction substantially parallel to an arc having the crank-shaft as a center,` second arm carried by said shaft and havin-G a portion movable in the eective portion of said guide-slot immediately at the beginning of the recoil of said barrel to actnate said belt-slide and in the non-effection portion of said slot during the finish of said recoil whereby the belt-slide remains at est during said finish of said recoil and a artridge feed-lever carried by said beltlide.

l. ln a machine gun, the combination of a. sliding barrel having a transverse groove, a stationary feeding casing, a slide mounted in said transverse groove, a crankshaft journaled in said casing, an arm carried by said crank shaft and connected with said slide, a belt-slide movable in said casing and provided with a guide-slot having an eective portion extending parallel with the axis of the barrel and with a non-elfective portion extending in a direction substantially parallel to an arc having the crankshaft as a center, a second arm carried by said shaft and having a portion movable in the effec.- tivo portion of said guide-slot immediately at the beginning of the recoil of said barrel through said casing,

to actiiater said belt-slide and in the nonf effective portion or' said slot during the finish of said recoil whereby the belt-s1ide remains at rest daring said finish of said recoil, a cartridge feed-lever carried by said belt-slide and means for locking the cartridge-belt against yielding during the outward movement of the belt-slider 5. In a machine gun, the combination of a sliding barrel, a stationary feeding casing, a cartridge belt transversely movable a belt-slide adapted to be moved transversely in said casing to in termittently feed said cartridge belt, a device connected with said barrel and actuated thereby and means for connecting said slide with said device whereby the recoil of the gun is transmitted to said slide and whereby the latter remains at rest during the finish of the said recoil and during the beginning of the forward movement of the barrel, spring operated bell-crank levers mounted orr the feeding casing and lugs on said levers adapted to project into the space between two adjacent cartridges in the cartridge belt whereby the latter is locked against movement in one direction.

UGUST ALBERT KARL HEINEMNN.

Witnesses WOLDEMAI: HAUPT, HENRY l-l/isrnn. 

